Abstract: Optical interconnectors and methods for optically interconnecting structures, such as printed circuit boards. The optical interconnectors comprise at least two optical fibers having one end embedded in a structure such as a printed circuit board and at least one sleeve for housing termination portions of two optical fibers. The termination portions of the fibers are positioned and secured within the sleeve so that end surfaces of the optical fibers are abutted together. The resulting optical interconnectors have low loss and occupy a small amount of space while maintaining a flat profile.

Abstract: A method and apparatus for joining flat-plate electrodes wherein a spacer, to which a joining material such as a low-melting-point crystallized glass containing a crystallization promoting agent is applied, is interposed between the electrodes to be joined. The electrodes and spacer are placed and held between upper and lower attraction dies. The upper and lower attraction dies are placed between upper and lower heating blocks for heating and pressing the electrodes and spacer through the attraction dies to join the electrodes via molten joining material.

Abstract: A composite article, such as a telescope mirror blank, comprising a solid glass body and a supporting network structure, the structure being composed of a network of interlocking struts frit sealed to one another and to the face plate. The article is characterized in that sufficient of the glass body is incorporated in particulate form in the struts to maintain an average expansion mismatch (-50.degree. C. to +50.degree. C.) between the network structure and the glass body of no more than 0.15 ppm/.degree.C.

Abstract: A fiber optic coupler is formed by providing a glass tube having a longitudinal aperture extending therethrough. Protective coating is removed from a region of a first optical fiber intermediate the ends thereof. Protective coating is removed from an end region of at least one other optical fiber. The coated portion of the first fiber is threaded through the tube until the uncoated region thereof is near the tube end. The size of the aperture is insufficient for simultaneously receiving the coated portions of the first and second fibers in side-by-side relationship at the coated portion of both. The uncoated region of the second fiber is placed adjacent that of the first fiber, and both uncoated regions are simultaneously fed into the tube aperture.

Abstract: A method disclosure for making an economical fiber coupler including providing a glass tube having first and second end portions and a midregion, and a longitudinal aperture extending through it. Two suitably prepared glass optical fibers, each having a core and cladding, are disposed within the longitudinal aperture, the fibers extending beyond each end of the tube. The fibers are glued to each end portion. The midregion of the tube is evacuated, heated, collapsed about the fibers, and drawn to reduce the diameter of the resulting composite.

Abstract: A method of forming a fibre optic terminal assembly (17) comprising the steps of inserting fibres (8) into a duct (3) defined by a housing (1) comprising a sleeve portion (21) having an open end (10) and defining a tubular portion of the duct, the fibres being inserted such that the fibres are supported in a closely packed bundle throughout the tubular portion and project through the end of the sleeve portion, trimming the bundle to form an end face (11) thereof, and bonding the fibres to one another and to the housing thereby forming a terminal assembly. The fibres are bonded by applying heat locally to the end face to form a molten glass surface layer, allowing glass from the layer to flow between the fibres of the bundle and allowing the glass to cool such that the glass forms a matrix fusing the fibres to one another and to the housing.

Abstract: A optical fiber coupler manufacturing device is disclosed for the manufacture of fused-elongated type optical fiber couplers. The disclosed invention provides an optical fiber coupler manufacturing device having a chassis, a pair of movable stands provided within the chassis forming a space therebetween, optical fiber mounting units for mounting and fixing two or more component optical fibers on the above mentioned pair of movable stands, and a drive mechanism whereby the pair of movable stands can be driven back and forth in a direction parallel to the longitudinal axes of the component optical fibers.

Abstract: An insulated glass unit formed from a pair of glass sheets, one of which has an electroconductive coating, i.e. a first sheet, is fabricated by positioning the first sheet on a vacuum support and the other sheet, i.e. second sheet, spaced above the first sheet a sufficient distance therefrom to prevent arcing during electrical heating of the marginal edges of the second sheet. After the marginal edges of the second sheet are heated to a temperature sufficient to cause sagging of the marginal edges, the two sheets are brought together to join the marginal edges by fusion. A strip heater heats the edges of the sheet to a temperature sufficient to prevent chilling of the marginal edges of the upper sheet when contacting the marginal edges of the lower sheet. Thereafter, the sheets are separated from one another and air moved between the sheets to bloom the edes. After blooming the edges, the joined glass sheets are annealed, and an insulating gas moved into the airspace through a pore hole.

Abstract: A structure for packaging semiconductor integrated circuits including a ceramic housing consisting of a base and cap having opposed mating surfaces for subsequent mating during a cap-to-base sealing operation that encapsulates an integrated circuit within the ceramic housing. Each of the base and cap mating surfaces having at least one thin sintered layer consisting of at least two sealing glass paste compositions sequentially printed onto each of the opposed mating surfaces before being sintered. The sealing glass paste compositions containing a mixture of glass powder and a liquid vehicle. A first of the compositions is characterized by having a glass-to-vehicle ratio range of 9:1 to 15:1 which is facilitated by having a liquid vehicle containing a mixture consisting of 93 wt % isotridecyl alcohol, 5 wt % diacetone acetate and 2 wt % acrylic resin and a glass powder selected from the group of LS0113, LS2001B, XS1175M, and T187 industry type glass powders.

Abstract: The present invention is drawn to a method for forming a section in which a plurality of optical branch fibers are joined with each other. The branch fibers are connected with a single optical trunk fiber at the end faces thereof contacting each other. The configuration and area of the end face of the joined section of branch fibers are substantially identical to those of the end face of the trunk fiber. A die has a through-hole, for shaping the branch fibers, the sectional area and configuration of which are equal to those of the end face of the trunk fiber as taken perpendicular to the axis thereof. The branch fibers supplied to the heated die at a predetermined amount ratio are simultaneously drawn through the die. The ratio between amounts of respective branch fibers to be supplied to the die is set to correspond with a desired signal branching ratio of the optical coupler to be obtained.

Abstract: The invention relates to an apparatus and process for the direct production of a composite yarn or ribbon of continuous reinforcement fibers and a thermoplastic organic material. The process includes drawing reinforcement fibers from molten glass, driving or extruding a thermoplastic organic material, converging the paths followed by the reinforcement fibers and the organic material toward one another, and joining the organic material and fibers in at least one composite yarn or ribbon. An apparatus for conducting this process is also disclosed.

Abstract: In a method of manufacturing a semiconductor device, at least a support body (1) and a monocrystalline semiconductor body (2) are provided with at least one flat optically smooth surface obtained by means of bulk-reducing polishing (mirror polishing), while at least the semiconductor body is provided at the optically smooth surface with an oxide layer (3). The two bodies (1 and 2) are brought into contact with each other in a dust-free atmosphere after their flat surfaces have been cleaned in order to obtain a mechanical connection. Before the bodies are brought into contact with each other, at least the oxide layer (3) on the semiconductor body (2) is subjected to a bonding-activating operation, while after a connection has been formed between the surfaces, radiation (5) of a laser is focused on the connection surface of the two bodies and material of at least the semiconductor body is molten locally near the connection surface by means of the laser radiation.

Abstract: The method of producing a hermetic stable structural bond between quartz crystals includes providing first and second quartz crystals and depositing thin films of borosilicate glass and silicon on portions of the first and second crystals, respectively. The portions of the first and second crystals are then juxtaposed in a surface contact relationship and heated to a temperature for a period sufficient to cause the glass and silicon films to become electrically conductive. An electrical potential is then applied across the first and second crystals for creating an electrostatic field between the adjoining surfaces and causing the juxtaposed portions to be attracted into an intimate contact and form a bond for joining the adjoining surfaces of the crystals.

Abstract: A camera mirror-drum with good precision and strength comprising a molded part in which glass fibers with an aspect ratio of 3-7 are dispersed in a resin at the overall proportion of 35-40% by weight, and a method and an apparatus for the manufacture of the mirror-drum.

Abstract: A method of joining a number of articles using a low-melting point glass whereby recesses in the layer of low-melting point glass initially formed before joining reduces the entrapment of bubbles within the glass layer. Preferably, the recesses are formed by protrusions in a mask used to form the coating of low-melting point glass prior to bonding.

Abstract: A fiber optic coupler has at least two optical fibers each having a core with a cladding material disposed thereabout. The fibers, in a limited length coupling region, have the cladding material removed and the core exposed, the thickness of the cladding material increasing is smooth transition from immediately adjacent the exposed core in the limited length coupling region. The fibers in the limited length coupling region are joined by coalescing. In preferred embodiments, in the limited length coupling region, a portion of the core is removed, the core diameter in the coupling region being less than the core diameter in regions adjacent thereto, the outer diameter of the core decreasing in smooth transition from immediately adjacent the cladding material. A method and product of forming these couplers or others with the fibers in crossed relationship are also described.

Abstract: In a method for the production of cylindrically symmetric bodies with given radial gradient of the material properties, for example of the refractive index, at least two rod-shaped molded bodies consisting of materials with different properties are joined in parallel and, following lowering of the viscosity of both materials, the bodies are twisted many times in a spiral around a longitudinal axis, such that a desired radial gradient of the material properties arises, where metallic, semiconducting, or insulating materials may be used, and the viscosity is varied through changing the temperature or adding or removing a solvent.

Abstract: A method of manufacturing a semiconductor substrate includes the steps of performing flame electrolysis on a galss source with an oxyhydrogen flame, spray-depositing the resultant glass particles on a joint surface of a semiconductor substrate, placing another semiconductor substrate on the deposited glass particles and performing heat-treatment, and joining the two substrates by sintering the glass particles.

Abstract: A bonding composition comprising a metal oxide melt comprising (a) CaO, (b) SiO.sub.2 and/or Al.sub.2 O.sub.3, and (c) a metal oxide selected from TiO.sub.2, ZrO.sub.2, Cr.sub.2 O.sub.3, HfO.sub.2, Nb.sub.2 O.sub.3 and Ta.sub.2 O.sub.5 is melt-bonded on the surface of a ceramic material, and the ceramic material is bonded to an adherent, if necessary through at least one layer selected from a plating layer, a solder layer, and a buffer layer. In this manner, a strong bonding can be very easily obtained.

Abstract: This invention provides a method for forming ring laser gyroscope frames without extensive machining. Parts of necessary configurations for such frames are so fashioned that they can be sealed together into a unit. Those parts are prepared from very low expansion glass-ceramics of particular compositions and are sealed together with low expansion, thermally devitrifiable sealing glasses, also of particular compositions.

Abstract: A method of the production of the ceramic superconductor filament comprisesa step including mixing raw materials of ceramic superconductor, subsequently shaping the mixed ceramic superconductor into a ceramic superconductor body of a predetermined shape and preliminarily sintering thereof and further subsequently crushing the sintered ceramic superconductor body into ceramic superconductor powder;a step of filling the ceramic superconductor powder in a glass tube;a step of heating the glass tube including ceramic superconductor powder so that the ceramic superconductor powder is molten; anda step of spinning the glass tube including the ceramic superconductor materialwhereby a ceramic super conductor covered with the glass material can be obtained.

Abstract: Methods for bonding transparent materials to opaque materials. The materials to be bonded are placed in tightly abutting relation to one another, and an energetic laser pulse is directed through the transparent material until it melts a thin surface layer of the opaque material. The desired bond is formed when the melted layer solidifies. In alternative embodiments the transparent material is precoated with various mediator materials to facilitate the bonding process.

Abstract: Technique for producing hollow composite articles utilizing vapor deposition. Fibers, wound around a supply reel, are fed to a take-up reel, while glass matrix is deposited on the fiber substrate via a vapor deposition process. The layers of fiber/matrix on the take-up reel are heated to fuse the composite, producing a glass matrix composite.

Abstract: Thermal energy from quartz lamp heaters are used to fire ceramic enamel material onto a glass substrate while minimizing any increase in the temperature of the glass.

Abstract: A magnetic head having head core constituted by a sandwiched magnetic material on both side thereof by a substrate materials such as, and the magnetic material and the substrate materials are bonded by crystallized glass containing crystals such as gahnite, willemite or the like.

Abstract: A method of making a CRT mask support structure with a faceplate mounted metal alloy rail filled with solder glass, including the step of coating the interior of the rail with a surfactant prior to filling to promote wetting of the rail by the solder paste.

Abstract: An apparatus and method are provided to homogenize the intensity profile of the beam emitted by an excimer laser. The excimer laser beam is collected by a closely packed ultraviolet-grade optical fiber bundle array having its individual fibers intermingled in a random or preconceived format to result in an intermixing of the light from the individual fiber cores to produce a uniform intensity profile. The output ends of the fibers are gathered or fused, and optionally tapered. before being cleaved to provide an output face that is custom shaped for a desired illumination pattern. The flexible nature of the fiber bundle allows for remote materials processing applications.

Abstract: A method of making an economical fiber coupler comprises providing a glass tube having first and second end portions and a midregion, and a longitudinal aperture extending therethrough. Two suitably prepared glass optical fibers, each having a core and cladding, are disposed within the longitudinal aperture, the fibers extending beyond each end thereof. The fibers are held taut to effect a tension therein, and they are glued to each end portion. The midregion of the member is heated, collapsed about the fibers, and drawn to reduce the diameter thereof.

Abstract: The method seals optical windows in explosive initiators so that the resulting seal remains undamaged by exposure to about - 320.degree.-840.degree. F. and pressures up to 26000 psi. The method includes disposing a solid body optical window of quartz or silica glass or the like in a passageway in a wall of an explosive initiator body of metal, ceramic or the like. The optical window is dimensioned relative to the passageway so that an annular space is provided between the outer periphery of the optical window and the passageway wall. This annular space is filled with solder glass, in powdered or solid body or slurry form. Preferably, the solder glass is a ring which closely fits around the optical window. The resulting sub-assembly preferably abuts a shelf in the passageway formed between two contiguous portions of the passageway with different diameters, the sub-assembly being in the larger portion.

Abstract: A process is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and tensed foil shadow mask. The process comprises providing a trough-like shadow mask support structure for receiving and securing the mask and filling the structure with a devitrifying solder glass paste of relatively low viscosity. The structure is then over-filled with devitrifying solder glass paste of relatively high viscosity. The structure is joined with the faceplate with the plate of relatively high viscosity in contact with the faceplate. The faceplate and the structure is heated to a temperature effective to shrink the solder glass paste into the structure and devitrify the paste to permanently secure the structure to the faceplate.

Abstract: In an integrated thermal processing method the bulb is completely processed in a dedicated oven. The inside and outside of the bulb are simultaneously heated. The inside and outside are also simultaneously cooled. During the evacuation a temperature gradient is maintained across the face of the panel to reduce tensile stresses which develop in the bulb skirt area during evacuation.

Abstract: A telescope mirror blank having a supporting network core composed of sintered ceramic struts, and a method of forming such core from a thermally crystallizable, powdered glass and as a separate component from the faceplate, are disclosed. Optionally, the mirror faceplate may be formed in a similar manner.

Abstract: A fiber optic coupler is formed as follows. Glass optical fibers, each having a core, cladding and coating are disposed within the longitudinal aperture of a capillary tube, the fibers extending beyond each end thereof. The fibers are preferably held taut to effect a tension therein. The coating is removed from that portion of the fibers in the midregion of the tube by oxidation, depolymerization or the like. The coating remains on those portions of the fibers extending into the ends of the apertures to precisely orient the fibers within the tube. The midregion of the tube is heated, collapsed about the fibers, and drawn to reduce the diameter thereof.

Abstract: A multidirectionally fiber reinforced-glass matrix composite article is disclosed. The fiber reinforcement is precisely oriented in three or more directions to provide high strength and stiffness in each of the three or more directions. A method for making a multidimensionally fiber reinforced glass matrix composite article is also disclosed. The method includes impregnating a fiber preform with a colloidal suspension of inorganic material, cooling the impregnated fiber preform to precipitate the inorganic material, drying the preform, impregnating the preform with heated glass matrix material, and cooling the glass impregnated preform to form the multidirectionally fiber reinforced glass matrix composite article.

Abstract: A method for producing reflectors in a continuous length of optical fiber is disclosed. The present process includes the steps of preparing the ends of two or more optical fibers, placing one or more of these fibers in a vacuum system and applying a metallic or dielectric coating to the fiber ends, and then fusing the prepared, coated ends of the fibers together until the reflectivity of the region reaches a desired value.

Abstract: A magnetic head comprises a main core (41) made of sendust material and a pair of reinforcing cores (45) for holding the main core so that the main core is sandwiched between the pair of reinforcing cores, in which the main core is adhered to the pair of reinforcing cores by glass material through transition metal layers (48) formed on both sides of the main core. The main core is comprised of a pair of core halves (41a, 41b) having their respective transition metal layers formed on their contacting surfaces, the pair of core halves with transition metal layers (25) being adhered to each other by glass material (29).

Abstract: The invention is a method of molding an article from a layed up preform having an optical fiber embedded therein, the optical fiber having at least one end for coupling to an external optical fiber. The method comprising the steps of: providing the optical fiber; providing a hollow tubular sleeve having first and second ends; inserting the at least one end of the optical fiber into the first end of said sleeve such that it extends through a portion thereof forming an optical fiber assembly; providing a mold; laying up the preform in the mold; embedding the optical fiber assembly into the preform simultaneously with the step of laying up the preform; molding the preform to form the article; and removing the molded articel from the mold.

Abstract: New fiber optic elements and a new microchannel plate forming method for ximity focussed image intensifier tubes and a method for making them are provided. Higher resolution is provided at the center of the field of view by the use of graded fiber and channel sizes and by the use of convex and concave surfaces in proximity focus.

Abstract: A pair of V-shaped slot blocks mounted movably on a base in both the X and Y directions and a microscope for observing the opposed state of optical fibers contained on the blocks, are provided in an apparatus for fusion splicing optical fibers. The microscope is mounted movably in the X and Y directions under a base, thereby observing the opposed states of the optical fibers from below.

Abstract: A method for forming composite webs. The method includes introducing alternative fibers during the fiber glass drum or sliver manufacturing process so as to produce a composite web, strand or roving.

Abstract: A method for assembling and soldering pieces of stained glass involves placing a template to outline a mosaic fit of glass pieces on a workboard by nailing flat sided nails to the outer perimeter of the glassware as defined by the template in which glass pieces are cut and wrapped with copper foil positioned on the template with attaching the support assembly to a rotatable workboard which is positioned to solder the glassware together in which the template is subsequently removed and the glassware turned and rotated on the workboard and the glassware is soldered together.

Abstract: A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core material. The fiber bundles located around the inside edge of the glass tube are replaced by support fibers having both a core and a cladding of a material which is non-etchable under the above-described conditions. The assembly of the tube, bundles and support fibers is heated to fuse the tube, bundles and support fibers together. The etchable core material is then removed and the assembly sliced into wafers. The inner surface of each of the claddings which bound the channel formed after removal of the core material is rendered electron emissive by reduction of the lead oxide by hydrogen gas. Metal films are deposited onto the opposed surfaces of each of the wafers to form contacts.

Abstract: A method for producing reflectors in a continuous length of optical fiber is disclosed. The present process includes the steps of preparing the ends of two or more optical fibers, placing one or more of these fibers in a vacuum system and applying a metallic or dielectric coating to the fiber ends, and then fusing the prepared, coated ends of the fibers together until the reflectivity of the region reaches a desired value.

Abstract: New fiber optic elements and a new microchannel plate for proximity focus image intensifier tubes and a method for making them are provided. Higher resolution is provided at the center of the field of view by the use of graded fiber and channel sizes and by the use of convex and concave surfaces in proximity focus.

Abstract: A magnetic head having head core constituted by a sandwiched magnetic material on both side thereof by a substrate materials such as, and the magnetic material and the substrate materials are bonded by crystallized glass containing crystals such as gahnite, willemite or the like.

Abstract: A multi-core optical fiber with improved dimensional accuracy is produced by a method comprisinginserting at least two core glass rods in bores formed in a cladding glass rod having a refractive index lower than that of the core glass rods to be inserted,heating a composite of the cladding glass rod and the core glass rods to integrate them together, anddrawing the integrated composite to fabricate a multi-core optical fiber.The drawing may be carried out simultaneously with the integration step.

Abstract: A method of manufacturing glass yarns includes the steps of: forming a large number of glass filaments by drawing molten glass through a large number of orifices formed on the bottom of a bushing; forming a plurality of strands by separately gathering the large number of glass filaments after a sizing agent has been applied thereto with a plurality of gathering rollers aligned in such a manner that they are separated from each other by a predetermined gap; winding the plurality of strands on one winding tube mounted on a collet while traversing the strands by one traverse motion thereby forming one cake; drawing out the ends of the plurality of strands from the outer periphery of the cake and rewinding the cake in the state wherein the strands are separated from each other by a rewinder after the cake has been air dried; and winding each of the strands as a glass yarn on a bobbin while twisting it.

Abstract: A method of providing a unitary body comprised of two initially separate layers having similar coefficients of thermal expansion involves forming a mat of glass fibers in a configuration suitable for bonding the two layers together, placing the glass mat between them and heating the resulting stack to a temperature at which the individual fibers of the glass mat deform to form a continuous layer of glass which adheres to both layers, after which the stack is cooled to result in the unitary body.

Abstract: Improved bonding in a cathode ray tube (CRT) between its glass funnel and glass faceplate is achieved by applying a thin base layer of a priming agent to an aft portion of the faceplate adjacent to the periphery thereof as well as to the forward edge of the funnel prior to positioning of the CRT components in contact. An intermediate layer of sealing glass frit is then deposited upon either of the aforementioned layers of the priming agent and adheres to the two priming agent layers without forming a re-entrant geometry. By "priming" the two abutting glass surfaces over an area which extends beyond the area of high loading with the priming agent prior to joining these surfaces, bond integrity is ensured and high stress concentration in the seal is avoided. The sealing glass frit may be comprised of a conventional glass cement paste and is also used as the priming agent in a preferred embodiment.

Abstract: Magnetic head (1) has two connected core halves (4, 5) having recesses (2) at a plurality of areas, filled up with glass solder (2'). After securing the magnetic head to the head disc 3 in a predetermined position, the glass solder in the recesses is melted and the melting glass solder connects the magnetic head to the head disc.